Improvement in machines for facing t-heads



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JOHN GRIFFITH AND GEORGE W. WUNDRAM, OF NEW YORK, N. Y.

Letters Patent No. 113,653, dated April 11, 18.71.

IMPROVEMENT IN MACHINES FO\R FACING T-HEADS.

The Schedule referred to in these Letters Patent and making parl: of thesame.

To all whom 'it 'mag/'concern Be it known that we, J oHN GRIFFITH andGEORGE W. WUNDRAM, ofthe city, county, and State of N ew` York, haveinvented a new and improved Machine for Facing T-Heads; and we do herebydeclare the following to be a full, clear, and exact descriptionthereof, which will enable those skilled in the art to make and use. thesame, reference being had to the accompanying drawing forming part ofthis specification, in which drawing- Figure l represents a longitudinalvertical section of this invention.

Figure 2 is a plan or top view thereof.

Similar letters indicate corresponding part-s.

This invention relates to amachine composed of two head-blocks, each ofwhich forms the bearings for a spindle carrying a cutter-head or chuck,so that both ends or faces of a T-head or other similar article can beacted on simultaneously.

'lhe head-blocks slide on a suitable bed or on shears, and they aresubjected to the action ofeccentries or cams in such a manner that thecutters secured in the chucks are simultaneously driven in toward .thearticle t-o be faced and then drawn back, and

the work is accomplished with the least possible hand labor.

The bearings of the eccentrics are subjected to theV action ofadjustable wedges, whereby said bearings can always be kept in closecontact with the eccentrics and all lloss of motion at that spot cau'beavoided.

The chucks or cutter-heads are also subjected` to the action of wedgesand nuts, so t-hat the points of the cutters can always be brought inthe required position without trouble or much loss of time.

In the drawing- The letter A designates the bed or shears, on which arefitted two head-blocks B.

Each of these blocks forms the bearings for a spindle, D, on the inneredge of which is mounted a chuck or cutter-head, E.

In these chucks are secured the cutters o, which are used for facing offT- heads or other articles, and the shape of which is changed accordingto the work to be accomplished.

The article to be faced is fastened in a resi, F, between the chucks E,and in such a position that thevfaces to be acted on are equidistantfrom the points of the cutters in the two chucks, said rest beingprovided with a simple hand-screw for the purpose of quickly securingthe article to be faced.

The chucks Earc fitted on the ends oi" the spindles D so that they canbe removed in or out, and they are held in position by nuts a on one andkeys or wedges b on the other end.

By releasing the nuts and driving the wedges in the chucks are settoward each other, and by releasing th'e wedges and screwing up the nutsthe chucks are set apart so that the points of the cutters in the chuckscan be readily adjusted in the correct position toward the face of thearticle to be acted upon.

Each of the spindles D derives its motion from short counter-shafts G,whichV carry a pulley, H, and pinions I gearing in cog-wheels J, mountedon the appropriate spindles.

rIhe head-blocks B receive a reciprocating motion toward and from eachother by means of eccentrics c, which are mounted on the ends ofvertical arbors d, having their bearings in brackets c, secured to thebed and connected by bevel-wheels ff with a horizontal shaft, g, whichextends throughout the entire length of the bed.

This horizontal shaft connects, by a train of cogwheels, li, with one ofthe spindles l), one of the cog-wheels, It', in the train beingmountedon a lever, t', so that it can be thrown in andl out of gear withthe spindle, so that the shaft g can be started or stopped at pleasurewithout interfering with the motion of the spindles D.

The eccentrics c work in slides j, which are fitted Y into cavities k inthe head-blocks B, and confined therein by wedges l, which areadjustable by screws and nuts an, so that the slides are free to move ina transverse direction independently of the head-blocks, but theirmotion in the direction of the shears is connnuuicated to thehead-blocks.

If the slides wear out in their cavities the wedges l are set up and allloss of motion is thereby avoided.

By the action of the eccentrics c, therefore, the chucks carrying thecutters are caused to move toward and from each other, the throw of theeccentrics being 'made to conform to rthe nature of the article to befaced, so that the operation of' facing T-heads or other articles of asin'lilar nature can be effected with perfect accuracy and with theleast possible hand labor or loss of time. V

The motion of the shaft g and of the eccentrics c is so timed that thecutters are caused to move iu toward the article to be faced with therequired speed, and by throwingsaid shaft out of gear with the spindle,and turning it back by hand, the head-blocks can be moved back.l

What we claim as new, and desire to secure by Letters Patent, isl l. Thecombination of the rotary shaft D, chuck E, provided with the cutters o,wedge b, and nut a', operating substantially as described, for thepurpose Specified.

2. The wedges l, in combination with the slides j, cavities la,eccentrics c, and head-blocks B, substantially as set forth.

JOHN GRIFFITH. G. W. WUNDRAM. W'itnesses:

W. HAUFF, E. F. KAs'JnNHUBnR.

